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  <div id="layout-content"><div id="splfileobject.ftell" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">SplFileObject::ftell</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.1.0, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">SplFileObject::ftell</span> &mdash; <span class="dc-title">Return current file position</span></p>

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 <div class="refsect1 description" id="refsect1-splfileobject.ftell-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>SplFileObject::ftell</strong></span>(): <span class="type"><span class="type">int</span>|<span class="type"><span class="type false">false</span></span></span></div>

  <p class="para rdfs-comment">
   Returns the position of the file pointer which represents the current offset in the file stream.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-splfileobject.ftell-parameters">
  <h3 class="title">参数</h3>
  <p class="para">此函数没有参数。</p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-splfileobject.ftell-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
    Returns the position of the file pointer as an integer, or <strong><code>false</code></strong> on error.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-splfileobject.ftell-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-3714">
    <p><strong>示例 #1 <span class="methodname"><strong>SplFileObject::ftell()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$file&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">SplFileObject</span><span style="color: #007700">(</span><span style="color: #DD0000">"/etc/passwd"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;Read&nbsp;first&nbsp;line<br /></span><span style="color: #0000BB">$data&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$file</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">fgets</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">//&nbsp;Where&nbsp;are&nbsp;we?<br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #0000BB">$file</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">ftell</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-splfileobject.ftell-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.ftell.html" class="function" rel="rdfs-seeAlso">ftell()</a> - 返回文件指针读/写的位置</span></li>
   </ul>
  </p>
 </div>


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